when i try to install x-pack-5.0.2 on logstash 5.0.2 the manager tries to go to rubygems.org
[root@node logstash]# ./bin/logstash-plugin install file:///tmp/x-pack-5.0.2.zip
Validating file:///tmp/x-pack-5.0.2.zip
Unable to download data from https://rubygems.org - SocketError: initialize: name or service not known (https://rubygems.org/latest_specs.4.8.gz)
ERROR: Installation aborted, verification failed for file:///tmp/x-pack-5.0.2.zip
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